Precise needle bearing

Abstract

The utility model relates to a precise needle roller bearing, which comprises a shaft sleeve, a needle roller support and a needle roller, the shaft sleeve is provided with a mounting through hole, and the mounting through hole penetrates through the shaft sleeve; the roller pin support is provided with a preset number of roller pin installation cavities, the roller pins are installed in the roller pin installation cavities and rotate in the roller pin installation cavities, and first check blocks and second check blocks are arranged in the roller pin installation cavities. And the first stop block and the second stop block are used for preventing the roller pin from being separated from the roller pin mounting cavity. The precise needle roller bearing has the advantages of being simple in structure, easy to assemble and high in stability, and due to the fact that the first check block, the second check block, the third check block and the fourth check block are arranged on the needle roller support, and inclined faces are arranged on the first check block, the second check block, the third check block and the fourth check block; therefore, the roller pin is prevented from being separated from the mounting cavity on the roller pin bracket.

Description

Technical Field

[0001] The utility model relates to a precision needle roller bearing. Background Art

[0002] A needle roller bearing is a commonly used bearing, which has the advantages of large load-bearing capacity and simple assembly. In an existing technology, the needle roller bearing includes a bushing, a needle roller holder and needle rollers. An installation cavity is provided on the needle roller holder, and the needle rollers are installed in the installation cavity and can rotate in the installation cavity. The needle roller holder is fixedly installed together with the bushing. However, in this existing technology, if the load borne by the needle roller bearing is too large, the needle rollers are likely to fall off from the installation cavity on the needle roller holder, thereby causing the entire needle roller bearing to fail. Summary of the Invention

[0003] The purpose of the utility model is to solve the defects existing in the prior art, and a precision needle roller bearing is proposed.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a precision needle roller bearing, including a bushing, a needle roller holder and needle rollers. The bushing has an installation through hole, and the installation through hole penetrates through the bushing. A preset number of needle roller installation cavities are provided on the needle roller holder. The needle rollers are installed in the needle roller installation cavities and can rotate in the needle roller installation cavities. A first stop block and a second stop block are arranged in the needle roller installation cavities. The first stop block and the second stop block are used to prevent the needle rollers from detaching from the needle roller installation cavities.

[0005] Further, the needle roller holder includes a first ring, a second ring, a preset number of first connecting rods and a preset number of second connecting rods. Two ends of the first connecting rods are respectively fixedly connected to the first ring and the second ring. Two ends of the second connecting rods are respectively fixedly connected to the first ring and the second ring, and a preset distance is provided between the first connecting rods and the second connecting rods. The first ring, the second ring, the first connecting rods and the second connecting rods together enclose the needle roller installation cavities.

[0006] Further, the first stop block is fixedly arranged on the first connecting rod, the second stop block is fixedly arranged on the second connecting rod, and the first stop block and the second stop block are arranged oppositely.

[0007] Further, the first stop block has a first inclined surface, the second stop block has a second inclined surface. When the needle rollers are installed in the needle roller installation cavities, the first inclined surface, the second inclined surface are in contact with the needle rollers, so as to prevent the needle rollers from detaching from the needle roller installation cavities.

[0008] Furthermore, a third stopper is provided on the first connecting rod, and a fourth stopper is provided on the second connecting rod. The third stopper and the fourth stopper are arranged opposite to each other, and there is a preset distance between the first stopper and the third stopper, and there is a preset distance between the second stopper and the fourth stopper.

[0009] Furthermore, the third stopper has a third inclined surface, and the fourth stopper has a fourth inclined surface. When the needle roller is installed in the needle roller installation cavity, the third inclined surface, the fourth inclined surface and the needle roller are in contact, thereby preventing the needle roller from escaping from the needle roller installation cavity.

[0010] Furthermore, the needle roller bracket has an inserting hole, and the inserting hole passes through the needle roller bracket.

[0011] Furthermore, the sleeve is provided with a groove arranged along the circumferential direction, and an oil filling hole is opened on the groove. The oil filling hole passes through the sleeve, and when the needle roller bracket and the sleeve are installed together, a chamber is enclosed between the needle roller bracket and the sleeve, and the oil filling hole is fluidically connected to the chamber.

[0012] The beneficial effect of the present application is that the precision needle roller bearing provided by the present application has the advantages of simple structure, easy assembly and high stability, and in view of the fact that a first stopper, a second stopper, a third stopper and a fourth stopper are arranged on the needle roller bracket, and the first stopper, the second stopper, the third stopper and the fourth stopper are all provided with inclined surfaces, so as to prevent the needle roller from escaping from the mounting cavity on the needle roller bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a structural schematic diagram of a precision needle roller bearing provided by the utility model.

[0014] Figure 2 The utility model provides a schematic structural diagram of a needle roller support and a needle roller after installation of a precision needle roller bearing.

[0015] Figure 3 The utility model provides a schematic structural diagram of a needle roller bracket of a precision needle roller bearing. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below in conjunction with the specific embodiments and the accompanying drawings. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0017] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be reordered or adjusted in an obvious manner by those skilled in the art. Therefore, the specification and the drawings are only for clearly describing a certain embodiment and do not mean to be essential components and / or sequences.

[0018] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0019] Please refer to Figures 1-3 , the present application provides a precision needle bearing, which includes a bushing 1, a needle holder 2, and needles 3. The bushing 1 has an installation through hole 12, and the installation through hole 12 penetrates the bushing 1; a preset number of needle installation cavities 25 are provided on the needle holder 2, the needles 3 are installed in the needle installation cavities 25, and the needles 3 rotate in the needle installation cavities 25. A first stop block 26 and a second stop block 27 are provided in the needle installation cavities 25, and the first stop block 26 and the second stop block 27 are used to prevent the needles 3 from disengaging from the needle installation cavities 25.

[0020] In an embodiment of the present application, the needle roller holder 2 includes a first loop 21, a second loop 22, a preset number of first connecting rods 23, and a preset number of second connecting rods 24. Both ends of the first connecting rod 23 are fixedly connected to the first loop 21 and the second loop 22 respectively. Both ends of the second connecting rod 24 are fixedly connected to the first loop 21 and the second loop 22 respectively, and there is a preset distance between the first connecting rod 23 and the second connecting rod 24. The first loop 21, the second loop 22, the first connecting rod 23, and the second connecting rod 24 together enclose the needle roller mounting cavity 25.

[0021] In an embodiment of the present application, the first stop block 26 is fixedly arranged on the first connecting rod 23, the second stop block 27 is fixedly arranged on the second connecting rod 24, and the first stop block 26 and the second stop block 27 are arranged oppositely.

[0022] In an embodiment of the present application, the first stop block 26 has a first inclined surface, the second stop block 27 has a second inclined surface. When the needle roller 3 is installed in the needle roller mounting cavity 25, the first inclined surface, the second inclined surface and the needle roller 3 are in contact, thereby preventing the needle roller 3 from disengaging from the needle roller mounting cavity 25.

[0023] In an embodiment of the present application, a third stop block 28 is further arranged on the first connecting rod 23, a fourth stop block 29 is further arranged on the second connecting rod 24. The third stop block 28 and the fourth stop block 29 are arranged oppositely, and there is a preset distance between the first stop block 26 and the third stop block 28, and there is a preset distance between the second stop block 27 and the fourth stop block 29.

[0024] In an embodiment of the present application, the third stop block 28 has a third inclined surface, the fourth stop block 29 has a fourth inclined surface. When the needle roller 3 is installed in the needle roller mounting cavity 25, the third inclined surface, the fourth inclined surface and the needle roller 3 are in contact, thereby preventing the needle roller 3 from disengaging from the needle roller mounting cavity 25.

[0025] In an embodiment of the present application, the needle roller holder 2 has a socket hole 20, and the socket hole 20 penetrates through the needle roller holder 2.

[0026] In an embodiment of the present application, a groove 10 is arranged on the sleeve 1 along the circumferential direction, and an oil filling hole 11 is opened in the groove 10. The oil filling hole 11 penetrates through the sleeve 1. When the needle roller holder 2 and the sleeve 1 are installed together, a chamber (not shown) is formed between the needle roller holder 2 and the sleeve 1, and the oil filling hole 11 is in fluid communication with the chamber.

[0027] The precision needle roller bearing provided in the present application has the advantages of simple structure, easy assembly and high stability. In view of the fact that a first stopper, a second stopper, a third stopper and a fourth stopper are arranged on the needle roller bracket, and the first stopper, the second stopper, the third stopper and the fourth stopper are all provided with inclined surfaces, the needle roller is prevented from escaping from the mounting cavity on the needle roller bracket.

[0028] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A precision needle roller bearing, characterized in that, It includes a shaft sleeve, a needle roller bracket and a needle roller, the shaft sleeve has a mounting through hole, and the mounting through hole passes through the shaft sleeve; the needle roller bracket is provided with a preset number of needle roller mounting cavities, the needle roller is installed in the needle roller mounting cavity, and the needle roller rotates in the needle roller mounting cavity, and a first stopper and a second stopper are provided in the needle roller mounting cavity, and the first stopper and the second stopper are used to prevent the needle roller from escaping from the needle roller mounting cavity.

2. The precision needle roller bearing according to claim 1, characterized in that, The needle roller bracket includes a first ring, a second ring, a preset number of first connecting rods, and a preset number of second connecting rods. The two ends of the first connecting rod are respectively fixedly connected to the first ring and the second ring, and the two ends of the second connecting rod are respectively fixedly connected to the first ring and the second ring, and there is a preset distance between the first connecting rod and the second connecting rod; the first ring, the second ring, the first connecting rod, and the second connecting rod together form the needle roller installation cavity.

3. The precision needle roller bearing according to claim 2, characterized in that, The first stopper is fixedly arranged on the first connecting rod, the second stopper is fixedly arranged on the second connecting rod, and the first stopper and the second stopper are arranged opposite to each other.

4. The precision needle roller bearing according to claim 3, wherein, The first stopper has a first inclined surface, and the second stopper has a second inclined surface. When the needle roller is installed in the needle roller installation cavity, the first inclined surface, the second inclined surface and the needle roller are in contact, thereby preventing the needle roller from leaving the needle roller installation cavity.

5. The precision needle roller bearing according to claim 4, wherein A third stopper is also provided on the first connecting rod, and a fourth stopper is also provided on the second connecting rod. The third stopper and the fourth stopper are arranged opposite to each other, and there is a preset distance between the first stopper and the third stopper, and there is a preset distance between the second stopper and the fourth stopper.

6. The precision needle roller bearing according to claim 5, wherein The third stopper has a third inclined surface, and the fourth stopper has a fourth inclined surface. When the needle roller is installed in the needle roller installation cavity, the third inclined surface, the fourth inclined surface and the needle roller are in contact, thereby preventing the needle roller from leaving the needle roller installation cavity.

7. The precision needle roller bearing according to claim 6, characterized in that, The needle roller bracket has an inserting hole, and the inserting hole passes through the needle roller bracket.

8. The precision needle roller bearing according to claim 7, wherein, The sleeve is provided with a groove arranged along the circumferential direction, and an oil filling hole is opened on the groove. The oil filling hole passes through the sleeve, and when the needle roller bracket and the sleeve are installed together, a chamber is enclosed between the needle roller bracket and the sleeve, and the oil filling hole is fluidically connected to the chamber.

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